RenalPro Plus nutritional supplement helps to support renal function in cats and dogs. It contains Lactobacillus Acidophilus and Bifidobacterium bifudum (beneficial bacteria) to help metabolize uremic toxins. FOS (Fruto-oligosaccharides) is a Prebiotic that works synergistically with the Probiotics. Also Contains Folic Acid, Pyridoxine and Vitamin B12. Indicated for both Dogs and Cats.